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# Pete Jemian <2-0863>
# requesting 6 days, at minimum=4 days
# beamline 33ID, "Anomalous USAXS investigation of Ni-base superalloys"
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# top:/home/www/beamtime-requests/req00456.txt
# UNICAT Member Beam Time Request  #456
# created Sun Aug 24 01:51:30 CDT 2003
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beamline:
	33ID

collaboration:
	Yes

contact:
	2-0863

days:
	6

description:
	Using ASAXS, we will study the gamma prime populations in a
series of Waspaloy samples as a function of long term thermal exposure
of up to 12626 hours.  ASAXS is necessary to isolate the gamma prime
population from the other precipitation such as grain-boundary
carbides.

Commercial Ni-base superalloys, such as Waspaloy, used in aircraft
engines, have found use in high temperature applications for a
number of years due to the effects of a fine dispersion of coherent
gamma prime intermetallic precipitates such as Ni3Al.  Stability
of these alloys at operating temperature is a key concern.

We will then correlate our ASAXS determinations of size, shape and
distribution of all phases present with complementary electrical
characterization measurements and microscopy performed at Georgia
Tech.  All of these techniques were chosen because, together, they
have the potential to provide statistically significant results that
could then be used to develop structure-property correlations that
will spawn better understanding of the kinetics of degradation in this
important class of structural materials.  The experimental results
will be complemented by modeling of the electrical properties using
effective medium, percolation and finite element models.

equipment_required:
	USAXS

experiment:
	Anomalous USAXS investigation of Ni-base superalloys

foreign_nationals:
	

hazards:
	no hazards
all sample prep will be done offsite
samples are metal foils
non-hazardous

minimumdays:
	4

name:
	Pete Jemian

new_request:
	ON

nonmembers:
	Prof. Rosario Gerhardt, Georgia Tech (will send the samples)

unacceptable_dates:
	Gabrielle Long will work with me on this, 
  She is not available for this research on these dates: 
  10/6, 10/18-10/19, 10/20-21, 10/29-11/6

z34ID_details:
	


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